Just out of interest… has anyone been in a position where they have bucket loads of posts on their blog and buckets of plugins, but would like to upgrade to the latest version of WordPress?

I’m running 2.01 now on 3 different blogs, and 2.02 on two more and feel the time could be right to make the move from 1.52 for kenmc.com. Has anyone had any issues in upgrading? Serious downtime? Broken plugins? Lost posts?